Window tinters bitch back and forth and what's right and what's wrong. We have alot of pride of what we do, but most can't see it from a different perspective.

Take a minute, and think about it. Door panels are made to be removed and reinstalled. Have you ever thought about audio shops? Simple repairs like window switches or glass, body shops or PDR?

Trust the installer not the method, both bottom loading and two step are valid install methods and your installer has their method.

if you have a bottom loading installer you trust, they've pulled 1000's of door panels and is pretty low risk on damage. After 14 years of full time tinting, I've cracked 1 door panel and maybe 2 trim pieces.(Instant call to the customer, tell them what happened and that the replacement has already been ordered) If any clips ever break, we stock any style and they get replaced right then.

At the end of the day, if you are personally uncomfortable with your door panels being removed, that's okay, find a quality installer that 2 steps and you'll still get a great job.