A job being hard doesn't mean it'll pay well, but a job being quite easy usually means it won't pay well, because it's easy enough to replace whoever's demanding more pay.
Of course, you'll get people here insisting that web dev or whatever pays well and is easy, but try asking actual hiring managers and recruiters how easy it is to find competent experienced devs.
The reality is probably that it is indeed fairly easy for some people who have a knack for the kind of thinking required. But for most people, it's not easy at all, and demand is, of course, very high.
Of course, you'll get people here insisting that web dev or whatever pays well and is easy, but try asking actual hiring managers and recruiters how easy it is to find competent experienced devs.
The reality is probably that it is indeed fairly easy for some people who have a knack for the kind of thinking required. But for most people, it's not easy at all, and demand is, of course, very high.