Plants are the genetic whackos of the biology world. If memory serves, wheat was recently the first plant genome sequenced and wheat is usually 4n. I’m no plant geneticist but I do know that plants play a different ball game when it comes ploidy. Heck, there are even organisms that are 1n and some that are 6n and everywhere in between.
Like he said, plants have no problem at all with polyploidy, it is not at all uncommon for plants to have as much as 128 N. For a human to have such a genome is just a disaster.
When botanists make generalizations they usually base it on the plant Arabidopsis thaliana, for its simple genome and short generation time. Its entire genome has approximately 26000 genes in it (for reference human genomes have approximately 30000 genes).