Maybe this thread can be rescued:
Seeds. Seeds are abundant. Flora in general is not limited by its reproductive capacity but by habitat. Most seeding plants, being unable to move itself or place seeds in desirable locations, produce way more seeds than there will be offsprings. They will, by chance, end up in a better or worse location and compete with each other and other species. What would be if every Syrian Rue seed ...? Syrian rue apocalypse, end of diversity and famines.
More chances. I think the issue is the underlying asumption, that chances are 'given'. Ehich is not. Our human and egocentric understanding of giving often if not always implies a human act. But in fact chances and odds just are. They are not given, as they cant be taken either, they just are and if we feel they were given or taken we actually wittness manifestation of chances. Just like some plants are not here anymore and some have not been here yet the plants that are simply are the way they are and are as many as they are. An alternate or fictional version of a present state holds little to no value in discussions to me, it is speculations based on speculations and in the end all those speculations can be proven wrong.
Lastly: Inbreeds. I wonder if any implications can be drawn from such strong fascination that becomes obvious when the topic is brought up in a forced manner and mostly unrelated
BTW: Inbreeding does not do any harm, many plants even self fertilize for generations. Even healthy mamal populations do not suffer from inbreeding, it only increases the odds of unhealthy predispositions to show and be severe.
I like what we have in flora, I like the diversity, I like some plants being rare, others abundant, I'd not find more joy in flora if everything was ubiquitous. Given a state that has manifested itself maybe you should not question history or past but future, maybe one could speculate how certain plants future will be and if we find little comfort in our speculation we should figure out what to do avout it.