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Yeah, I don’t know enough about rocket science to say anything about that
I can imagine @sgrif knowing more.
Skipping isn't necessarily catastrophically bad depending on the orbit, but if you skip on a lunar re-entry that can mean many hours or even days before re-entry. The service module was jettisoned at this point, so that can be bad. More generally it's about thermal load though
The shallower your re-entry the more thermal load overall the craft will have to endure, but in exchange you will have less peak heating. More thermal load means you need more ablative heat shielding, meaning more mass, so you want to have the steepest reentry you can survive
For crewed craft, g forces endured by the crew is also a factor, which are lower on shallower re-entry. The film return capsule in the CORONA program would have taken upwards of 20-30 Gs at peak. Gemini wouldn't have had more than 3-4
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