Key Switch vs Layout, Which is More Important for Ergonomics?

if you can only pick one, then, good key switches is more important than the physical layout design, such as split and tenting. Because, key switches actively interact with your hand muscles, every second.

For example, this

• 
  KEMOVE K68

is better than

• 
  Microsoft Sculpt 😒

because the kemove has mechanical key switches. [see Keyboard Key Switch Mechanisms]