Whilst technically true, if you notice the more points you spend on a skill, the less return you'll get from your points. The green areas of each skill give an 18 point bonus, the yellow 10, and the red only gives 5 points each. You wind up being better off rounding your skills out than pumping into the red areas.

Typically speaking my personal build is 3 into all then add additional required points for that rank into gaining BOff training skills. Adding a few more when necessary to unlock the next rank.

Now whilst this may feel a waste it gives them at least a 54 point bonus, the lower levels getting up to a 64 point bonus, leaving my captain well rounded with the ability to train engineering officers in a wide variety of engineering skills.

Link to my (probably sub-optimal) build.