How much do you work and/or get paid in music?
I assume not much. So as a bit of an education, there is an expectation in the cover band scene to play like the recording. At least, 90%. Audiences only accept a small bit of change before you don't get hired back.
The market is driving playing with tracks. Some musicians like to eat.
But your comment also begs the question, if there's fifteen overdubs from your favorite musicians, how is playing to tracks any different?
To the concept that playing to tracks is cheating. Well, I guess a recording session shouldn't be allowed to overdub or edit tracks.
I work a lot, get paid little.
I quit doing the cover band rock and roll thing years ago. Too repetitious.
Have you heard of "blue ocean strategy"? When everyone is doing X, trying to be successful doing X better than everyone else who's also doing X is a high effort low profit strategy. You want to try to do the thing that fewer people are doing.
In a world with thousands of cover bands all trying to sound as much like the record as possible, there will always be someone who can do it a little better, or a little cheaper, or have one connection you don't have. Personally, I would choose not to compete in that crowded arena and try something different. For the amount of time people spend to try to reproduce the record exactly, just like all the other cover bands that think the same thing, you could do something different like developing your own sound and style and applying it to well known songs. It might be a failure in the marketplace, yes, but unless you're unusual, you probably aren't raking in the cash being a repeater pencil either.
So that's the business aspect of it.
As for the personal-satisfaction aspect of it, even when I was making the most I ever made as a gigging musician, I still had a day job, as I expect the vast majority of cover-band guys do. So if you are (being honest) doing this for fun and some spare cash, why not have some fun? Applying creativity to performing music is fun for me. If I wanted to just do the exact same thing over and over according to strict instructions, I might as well be playing last chair second violin in an orchestra somewhere. At least I wouldn't have drunks pouring beer on my instrument.
(By the way, the most successful bands I've been in, all had their own sound and style and applied these to their repertoire, not the other way round.)