When scientists want to find new solutions to problems, such as trying to figure out how to regrow limbs or organs, the best way forward is to gather as much knowledge about the possible solutions as possible. It is much better to study a lot of different mechanisms to regrowth rather than just focusing on one, because they have a much higher chance of finding one solution that actually works by having many options.

And it's a bad idea for people to pet these creatures since they are going to cut their limbs and watch them grow again.

Hopefully no one will do that :O