Half assed is using those T Taps you seen. The yellow ones. The red on smaller outputs like parking lights and brake switch isnt as bad.
All main power connections should be wire to wire. Dont believe me? Go to a ford Dealer that does them there and ask how they install them. Ask GM how they splice into wires. Every one will tell you wire to wire and solder. I dont solder them because customers want to reuse them a couple of times.
Here lets think of it in this way, you got say 10ga power wire and you want to hook up a 10ga power lead to it. You decide to do it quick and use T Taps. so you crimp on a flat blade connector to the wire you want to attach. Then you crimp the t tap which on a very thin piece of metal that puts mnor cuts on the sides of your insulation sometimes even cutting several strands cause it cant expand that much.
Then you plug the other thin flat blade into it. So your trying to pull 20-30amps through a thin metal piece that has 2 prongs (kinda like your dinner fork but only 2), touching the flat blade that goes to your other wire......
Faster install...........yes
Better install...........no
dependable.............at first maybe long term no
oh and yes it makes it alittle easier cause they maked the wires you would need to connect to. So you dont have to go searching for them.