For example the median expected annual pay for a typical Horse Rider/Exerciser in the United States is $53,327, so 50% of the people who perform the job of Horse Rider/Exerciser in the United States are expected to make less than $53,327. Percentile.
The short answer is, Yes! Gums can and do grow back on their own without your having to do anything special. Because oral hygiene professionals don't talk about this, it's hard to say how common it is. Now, to give you a response that any dentist would give you; yes.
Gums can be healed quite easily. For instance I was having receding gums. My dentist asked what kind of toothbrush I use, I told him a hard one. I felt like it cleaned my teeth better. Turns out hard is for dentures only, and otherwise all people should use soft. My gums grew back in a couple months.