I used tubeless for three years or so. Finally I started getting flats and it is impossible to put a tube in most of the modern tubeless tires and rims without pinching the tube. However, they do make tubeless repair kits that are dealt with from outside of the tire. One type has a push-in plug which is similar to the way they repair tubeless car tires. Another uses a little wedge device and you push in this stuff called "bacon" Most of the time if you get a flat large enough for the sealant not to be effective, it will have torn the tire cord as well. Using either of these other repair methods USUALLY will get you home but it is possible to get a large enough hole that you cannot repair it by any method.
But for my part I just couldn't stand messing about with tubeless tires and all of the goo. So I finally returned to clincher rims and clincher tires..
But as to your question. What makes you think that you couldn't be equally stranded with any tire system? Clincher, tubeless and tubular can all be cut so badly that they cannot be repaired. The trick is in the chances of you getting such a problem and with Tubeless you probably have less of a chance of catastrophic failure than any other type. Especially if you carry the plug system.
https://www.amazon.com/BriskMore-Tu...ubeless+tire+repair+kit&qid=1604002078&sr=8-8
Always remember to renew the sealant every 6 months or so. Despite the claims, NO sealant is forever. Pull the tire off and completely wash out the old sealant and allow the tire to dry and replace it and inject the new sealant in.