I live in an area where many don't have enough land or regulations will not allow a drain field. One Saturday afternoon we were having sewer problems and called 4 different sewer pumping companies... only one called back, the next Monday... guess they aren't hurting for customers. We do have a drain field and normally don't have problems, but do see the pumping trucks drive by often, many down the road from us need that service. No college degree needed, and shitty job, but guessing with what they charge their bills are paid and it's a service that wasn't shut down during lockdowns!