Except a hamstring can never truly fully heal...my understanding is no muscle can after there is any form of tearing, which is what a pull or a "tweak" is, albeit small.
Kinda like when you get a cut and your skin doesn't grow back exactly the same (you get a scar)...obviously a very small tweak is better than a huge tear, but my understanding is the nature of the hamstring muscle makes it much easier to happen again once there is scar tissue...I'd be really happy to learn this isn't the case with very small hamstring pulls.
I'm not saying it's gonna be a big issue, but it's like people hearing someone had a minor meniscus injury that just needed a "clean up" and being like, phew, that's good news that it's not an acl...when over the long term an acl might be less impactful.