I'm locked out of my tablet.

I've had this tablet since 2016, I actually thought it was lost until stumbling upon it. Due to the fact that I have not seen it in almost 2 years I cannot remember the password to get into the tablet. The email address associated with the tablet I hardly remember setting up so I'm also unable to get into that. I thought I remembered setting up a backup password. So if I attempted too many incorrect passwords it would then send me to a backup solution. This is not the case. Why is it if we cannot remember the password that we automatically have to factory reset I don't want to lose the data on the tablet I just want to find another way into it.