If you have enough users to have "too many issues to handle," then you're big enough that you need an official governance and contribution structure. You're also big enough where you'll have a pool of high quality contributors to promote to project-level-oversight status.

Nobody is saying "do all this work for free forever," but people are saying: "You have too much work you're avoiding. Why refuse to let other people help?" Once you reach a million users this isn't your private software anymore, it belongs to the community and you need to step up and allow faster development than one person can handle alone.