People often get so focused on reducing their wait for a specific ride (FOP, SDD, 7DMT, etc), that they don’t realize that utilizing the times when everyone else is rushing to those rides means the lines for the OTHER rides are so short they become practically walk-ons. This means, overall, you are saving time waiting in line OVERALL even if it means you’ll have to spend significantly LONGER in some lines.
To exemplify this (I’ll make up number here), let’s say 7DMT has a typical wait of 50 minutes at opening/RD. Then, time creeps up to 75 minutes a few hours later. BUT, during the time period when 7DMT is a 50 minute way, most of the “lesser rides” have a wait of 10 minutes or less. So, you can get through 5 of the lesser rides in the same time you’d be waiting for 7DMT.
Now, if instead, you decided to wait for 7DMT at RD, you get on in 50 minutes. But then after you get off, the wait times on the lesser rides have increased to 20 minutes each. This means that for the same 6 rides (5 lesser, plus 7DMT), you spend a total time of 50 + (5 * 20) = 150 minutes. In the former case, however, you spend 75 + (5 * 10) = 125 minutes! So, hitting 7DMT when the line is longer actually SAVES you 25 minutes total waiting in line.