if we have more users, that improves the value and quality of the fediverse overall
I don't consider this a given. E.g. your new users might all be dingleberries, or they might attract more bots. It also depends on your definition of quality. I quite like recognizing and conversing with regulars that I know from lemmy. This is something you lose with a larger userbase.
Here's another way a high monthly active user count doesn't necessarily lead to a quality platform. Suppose most users post once a month. Conversations will largely be dominated by posts from folks who have no real connection with each other. Any meaningful conversation is drowned in an ocean of seagulls going "have my updoot, kind sir" and "this!". Higher user count, lower quality.
Aside from that, vanity metrics like bare user count typically don't tell you whether you have a sustainable non-ad based platform. You don't need users, you need users willing to donate for the operation (to instance admins) and maintenance (to the devs) of the platform. And I feel (0 data to back this up) like users are more likely to be donating users if they feel like they know the operators and devs personally.
I'm not saying the idea of getting more users is bad, I'm just saying its goodness is very far from established.
It's so painful for me to see there's a group of people who are ostensibly allies to the Palestinian cause, but who balk at the idea of them actually defending themselves against the apartheid, ethnic cleansing, and genocide. The kind that will only support armed resistance after all is said and done, when it no longer matters. The kind that supports slave revolts in 19th century US, the warsaw uprising during WWII, the Black Panther party and Malcolm X in the 60s, the ANC during apartheid South Africa. But when a group uses violent means today to fight against horrific violence and oppression, that's a bridge too far and we all have to stop and think about the optics.
They've tried non-violent means. We've all seen where that ends. Look up the march of return. Non-violent demonstration. Resulted in Israeli snipers targetting children, the disabled, and the elderly. The world looked on and did fucking nothing. And that's been the story over and over, for nearly a century. There's kids being murdered on a daily basis, but you want these Palestinians to sit on their thumbs and host a tea party. Go fuck yourself, they do not have time for this.