From a traveler's point of view:
The Elizabeth Line was a game-changing godsend for a lot of people considering traveling to the UK by air. From Heathrow, the Piccadilly Line is too crowded, too slow, hard to bring extra luggage on, and doesn't go all the way across the center of London, so usually requires awkward transfers at complicated stations (like Green Park, etc.), which are hard to navigate with luggage. And Heathrow Express is just an overpriced ripoff, in most people' estimation; huge extra expense to maybe save a couple minutes. But the Elizabeth Line is fast, inexpensive, and goes right to and through the center of London. So when even considering a trip to the UK, the existence of the Elizabeth Line plays a big role in many people's decision-making.
Knowing all this ahead of time, I even always arrange my lodging to be very near an Elizabeth Line station, to enable easy transit upon arrival when I am exhausted with luggage, and then swift and reliable transit to the airport on departure day, when it is stressful and I want to get to the airport on time to catch a plane.
So, just as I have done on previous trips, I only even bought my plane tickets for my upcoming trip after confirming accomodation adjacent to an Elizabeth Line station.
The irony?
I'll be arriving at Heathrow on February 27, then departing from Heathrow on March 10th. So on BOTH DAYS the Elizabeth Line won't be running due to the strike. So all my arrangements and planning were for nothing. As usual.
Why "as usual"? Because this is the third trip in a row where I have made similar arrangements, and on all three trips, the Elizabeth Line wasn't running or had huge delays on the days I needed to use it. On my previous trip, got to the E Line stop at Heathrow only to learn trains weren't running due to some technical issue, and on the trip before that there was also a strike on the day I arrived and massive delays for some unknown reason on departure day, causing me to have to rush to the airport by other slower and more roundabout routes. Now, on this trip, thanks to my "clever" planning, I'm staying somewhere particularly inconvenient for transit from and to Heathrow, due to the strike.
It has gotten to the point where the Elizabeth Line, for all its miraculous positives, has become just too unreliable to count on as a dependable mode of transit. Too many strike days, too many technical glitches, too many delays.
For these (admittedly self-centered) reasons, I find the strike very annoying, as do almost all travelers and tourists. Unions were formed back during the industrial revolution when lower-class workers were paid pennies per day for dangerous work. But now -- rail workers get paid very upscale salaries already, and their work as drivers is not particularly dangerous, so unions serve no function other than as a tool to extort more money from the government by threatening to cripple the economy. Even when offered a large pay raise, then reject it and always demand more. More more more. It has gotten out of control, frankly.
From the perspective of travelers and tourists, we feel that we can no longer ever assume that the Elizabeth Line will actually be running on the days we would need it, so it might as well not exist when it comes to travel planning and decision-making. It's not the only factor when making travel decisions, obviously, but it can tip the scales. I do avoid traveling to airports that have poor public transit connections, as do many travelers, if we have the option of going elsewhere. So, the overall economy of the UK will be negatively impacted by the strike in ways that aren't directly measurable.
I have no magic answer for how to deal with strikes and unions, just adding in another voice to the conversation.