They didn't build the API to deal with people using it in a useful way so instead of making it useful they use limits to guard against use or over use. As a res

They didn't build the API to deal with people using it in a useful way so instead of making it useful they use limits to guard against use or over use. As a result they also prevent abusers / attackers from causing denial of service (thus busting SLAs and waking up tired engineers).