This is like eating junk food daily. Sure you did it for the past 10 years and nothing happened. Doesn't mean you can keep doing it and nothing will happen to you.
as someone who deals with this professionally I absolutely hate it when people say "spacers are fine" on IFS. That just shows me how little they know about suspension and not willing to learn. A few months back I just had a customer who bought his brand new rig from the dealer with dealer installed 2" spacer lift. WIth only 3k miles on odo the Upper ball joint was done already and suspension making all kinds of noise. Not to mention it rides like sh*t. Told the guy and showed him how a properly done lift should look and drive like, he made appointment to have it done correctly after the lap around the block.
Read here for why spacers are terrible ideas with animations:
accutuneoffroad.com
sure. you may not have problem with the tundra but all it takes is ONE single instance to destroy your truck and cause problems for you and other people around you. You drive an expensive truck, your truck deserves something better than that. Your own safety deserves something better than that. I can never understand why someone would cheap out on a vital component and get the mickey mouse option to risk a big tow and repair bill and time taken to deal with the repair which is going to be a lot more expensive than just getting the proper suspension setup.