> in speech however it can serve as a focusing point to indicate the next part is important

it's... exact opposite?

the main (attempted) use for ummms is to keep continuation of speech despite the pause. And the main complaint is exactly that it ruins the focus and doesn't give respite

It can be a focusing point when someone wants to highlight the deliberate use of euphemism, removing those would be, um, unwise.

Although that is probably the less common use.