I stand for plant genetic identity preservation and i think this "true to type" seeds thing causes a lot of damage and confusion in this regard. You can have a clone from a seed but that's probably the worst way to do that and you are probably not able to identify it with high confidence. People often do this because seeds is all they can get, so they don't even own the original plant to compare with. If you want to do this for fun, that's great, but if you don't have the means to do the proper identification, please keep your plant for yourself, don't sell or share genetic material as if it came from the original plant
Citrus seed has routinely been use to transfer Citrus varieties around the world in the past.
There is a high level of success in obtaining known varieties, and with knowledge of variety characteristics, off types can be rouged out at later stages.
Seed is easier to send with transit delays, compared to budwood.
More importantly seed is essentially virus free, whereas budwood often contains virus, or bacterial pathogens.
There is more skill required in growing rootstocks and grafting trees, compared to growing from seed.
Ideally both processes( seed propagation and grafting )should be followed, as back up to each other.
There is always some risk of variety drift with seed propagation, leading to seperate lines of a variety in different areas.
This is also possible with budwood, more so with some types of Citrus than others.
Bud sport mutations have lead to many Navel Orange varieties, even bud Chimera hybrids are known, where two types fuse into one bud creating a " hybrid " tree.
I think there is a need to balance variety preservation with genetic change and increased diversity.
If new variety types are clearly designated as such, I don't see such a problem.
Maintaining overly strict variety identity can lead to them to become genetic artefacts.
This has its good points, for preserving genetic diversity, and for cross breeding.
Many varieties have also lost their use purpose or utility in later years, ie Cider Apples, Storage Apples, Citrons for candied peel, Seville Orange for Marmalade Jam.
These varieties still exist, but have largely lost their use and popularity in modern times.