Excess current in Ignition 1 circuit?

Lets recognize that some components under the hood are encased in ceramics and receiving some amount of cooling from the engine fan.
Yes resistance causes heat but where you can see the result is plastic under the dash.A blind man feeling for the problem might be focusing elsewhere.
Every electrical component was deemed at least minimally adequate when the car was new. This includes the white plastic connector in question. Over time, the amount of current drawn through that connector can only increase.
The wiper circuit may be very close to blowing its fuse, same with the blower motor circuit and others. All combined are not quite enough to burn open the fusible link.
Maybe there is/was a method to the madness in the fact that they made this one and the connector at rear of right valve cover from white plastics ( for sighted folks ).
Having said all that... Some will just beef up these connections as the fail until they reach the root of the problem.