Is this rehearsal schedule over the top?

Hi I'm in a production of a short play (89 pages) in October. Since May we have been doing one rehearsal a week for 2 hours. I am one of the two main parts and I know all my lines by now and understand how all the scenes should work.

The directors have said that for the next 3 months there will be 2 rehearsals a week, going on for 3.5-4 hours, and then for all of September and October until the play, 4-5 rehearsals a week, again 3.5-4 hours.

This works out at well over 50 rehearsals! The rest of the cast has not bothered to learn their lines and also don't seem to have read the play as they have no idea about the dynamic of the scene. Also the directors don't talk about the play except in rehearsals and everybody has to stand around whilst they argue over how it should work.

I have health problems and work full time (most of the cast are housewives or work part-time), and I live 45 minutes from the place where we rehearse, so it's impossible to expect me to get home at midnight two nights a week for 3 months.

The number of rehearsals seems way excessive and also I feel it's unfair that we are delayed because others are not prepared. Am I being reasonable or is it normal to spend upwards of 200 hours on a short amateur production?