If by tools you mean commercial products (like your MS Office example), consider:
Brand loyalty Investopedia, Wikipedia
Brand loyalty is a result of consumer behavior and is affected by a person's preferences. Loyal customers will consistently purchase products from their preferred brands, regardless of convenience or price.
- He keeps buying Samsung phones even after better alternatives have emerged; out of brand loyalty.
For cases other than that of commercial products, you could consider proverbs like...
there's no accounting for taste
- "I love working at weekends." "Well, there's no accounting for taste!" (From cambridge)
to each his own / each to his own
- I keep telling him that car is the better and more comfortable way to commute, but he keeps using his motorcycle. Well, to each his own.
one man's meat is another man's poison
These expressions are a litte broader than your requirements, in that they cover a person's preference to something with no obvious disadvantage (like color). They're applicable, nonetheless.
PS - Your smoking example is a poor one. That's obviously a case of addiction/substance abuse, as pointed out in the comments.