Maybe, but obviously there’s some kind of number in mind or this post wouldn’t have happened.
(Disclaimer: This has turned into a long-ish post, and my apologies for that, but I think it’s important.)
I belong to a family of 5 guilds (4 active guilds, 1 vacation guild) and all of our active guilds have specific requirements. That said, all 4 active guilds also have had people who only do the minimum, or just barely above the minimum. The nice thing about having requirements in place is that even if folks only do the minimum, they are still doing what is asked and are therefore “pulling their weight”.
Having specific requirements makes the system completely transparent - saying “we want everyone to contribute” is fine, but without having a defined minimum it comes down to personal feelings on whether or not a member is contributing. A given member may think they are and there is nothing in place to tell them otherwise. Saying “do more” is subjective. You might mean you want to see the person contribute another 200k gold, but the member contributes 50k more because in their opinion it’s enough to be considered “more”.
Having requirements can align your guild to be successful in their goals, whatever they are. For example, if your guild wants to earn Legendary Tasks every week it would make sense to set a minimum gold requirement of around 500k. That ensures every member contributes around 1/30 of what is necessary to unlock LTs, even though it will only be your higher performers that actually contribute the millions of additional gold needed to get some LTs. Look at it another way - if someone joins a guild and expects to see LTs, he or she should expect to contribute 1/30 of what is required to get there…otherwise, they’re just expecting to mooch.
At the end of the day, if you “would like to see everyone contribute at least 300k” but you don’t want to list it as a requirement, you lose a lot of your ability to convince people to contribute 300k. Trying to lead a guild through attempting to encourage or even guilt people to do more because you don’t want to put a number in writing is going to sow the seeds of resentment eventually if it hasn’t already.
If you truly want a “no requirements” guild, then you need to put your money where your mouth is and truly be no requirements, which means accepting any and every contribution without the expectation of more, and without threatening to kick people if they don’t hit whatever the arbitrary term “doing enough” means. If you truly feel some people are not contributing enough, you should put requirements in place so everyone knows where the goalpost is.
Looking over the original post, several of the points conflict with each other.
Ok, so no requirements, which means no requirements at all.
But there’s no requirements, so this doesn’t matter.
Wait a second…this looks like a requirement.
If there’s no requirements, it doesn’t matter if someone only does one event…so again, you’re trying to enforce a requirement without listing it as a requirement.
If there are no requirements, this shouldn’t matter.
 I have NO issue with guilds not having requirements, but no requirements means no requirements and should be taken seriously.