I stopped using RQS for that very reason. Have had several of their strains hermie on me. Weak genetics imo. The other place i have been getting seeds from have not hermied. Yes stress will cause this. Yes there will be pollen and a good wipe down of the tent/area with wet rag will help that. Dont forget fans and light. But its good practice to clean the area after each grow any way.
Most of hermies i believe came from light stress and weak genetics. Although, if the seeds are brown and ripe, you can grow them. From a hermied plant all seeds have been female photos from my experience. (So yes female Mimosa photo for you) Others will not agree on using them. They can take on the hermie trait from the mother plant. I have over 300 seeds from a RQS runtz that hermied on me. Ive grown a few grows with the seeds. They can be finicky. But I have successfully used several and did not have them hermie (adjusted the lighting was the only difference i made, hence why i think light was part of my cause). You get some mutants from time to time, but its free seeds. When I go to use them, if I wanna grow 4 plants, I drop 8 seeds and take the 4 best that sprout. I have a lot and didnt pay for them, so I dont feel bad throwing 4 out.
If its full of tiny white seeds, that sucks! They suck to dig out and taste terrible if you miss some. Cant grow them, they are immature seeds. Imo that's good for nothing. I guess you can make hash or wax from the buds. I havent tried that yet so not sure on that.
Just my thoughts,
Best of Luck! Happy Growing!