Lol Keith.
We planned it like that so they could share toys and clothes and also be closer in age to share common interests.
Also all of the nappy changing and lack of sleep is just one big chunk and then it's done. If we had one every 2 years then that's 11 years of nappy changing. Fark that we're already doing 8 years of nappies.
It's actually not that hard to do providing you're organised af and give up the "single" party life that most of us lead in our twenties.