Why would some cross an F5 with an F2?

[AzSeaindooin420]

Yes both the s2(well call blue dream) x with male(well call space queen) will make the f1 of dream queen since f1 is considered a new cross. Since both blue dreams were crossed with the same male your still playing with the same genetics,just another roll of the dice with em which should have equal genetic diversity since there was no other genetics in play so doesn’t matter if the seeds came out of plant 1 or plant 2 taking the mixed handful from both, the following generation will be f2