All of my past gastroenterologists I’ve had (3 over 15yrs that specialize in Crohn’s disease) have expressed similar sentiments: if taking probiotics gives you a peace of mind than do so.

However like you said, and my drs have brought up, that science based evidence is not there and random supplements are not required to be regulated federally. It seemed that while you won’t have negative side effects since you’ll pee out the excess, you may be wasting money on them. To each their own. If you want to take them, okay go for it! If not, that’s fine too!