Yes, the fines are legally enforceable because (generally) you have to agree to them in order to purchase the house - joining the HOA and being bound by its rules either literally or functionally becomes a permanent part of the deed to the property. There isn’t a legally viable argument that you only signed that part under duress because you could have chosen to live somewhere else instead. You could technically get a like-minded group of neighbors to run for the HOA leadership roles and eliminate the petty rules, but the rider contract to the deed still exists.
Yes, the fines are legally enforceable because (generally) you have to agree to them in order to purchase the house - joining the HOA and being bound by its rules either literally or functionally becomes a permanent part of the deed to the property. There isn’t a legally viable argument that you only signed that part under duress because you could have chosen to live somewhere else instead. You could technically get a like-minded group of neighbors to run for the HOA leadership roles and eliminate the petty rules, but the rider contract to the deed still exists.