You may only see one 'space', but it's still several presses of the space bar.
'Using.....dots' or 'Using spaces'
The spaces are easier read because we acknowledge them as spaces and ignore them. They're negative space and of no consequence. Periods however are used to punctuate words, so when you see them spread out, it's confusing and distracting as you see them as part of the words and writing and not as 'spaces' between the words.