Is it safe to have only 24 teeth after extractions for the purpose of fixing mouth protrusion?

I am considering getting invisalign with 4 pre molars extracted to reduce my protruding mouth. If I decide to go through with it I will only have 24 teeth in my mouth. Is it ok to have such a low amount of teeth for eating etc? Will I get future jaw/teeth problems? My dentist said there's always a risk of some jaw issues etc when it comes to orthodontics which didn't really help my question. My clin check pics show the before/after and after arches pics look like the same size as an adolescence.