"Some are", or "some can be"?

Question

Do we say

Gaps can be dangerous things, but some gaps are beneficial.

or

Gaps can be dangerous things, but some gaps can be beneficial.

?

Answer 1

Both versions are acceptable. The second puts slightly less stress on the outcome, but neither are very different.

First version says some gaps - so not all of them.

Second version says can be which again means 'not always' as well as containing some gaps meaning not all of them.