Maitland has recovered from a hamstring injury to start on the wing in place of Blair Kinghorn – who can consider himself unfortunate to miss out after scoring a brilliant hat-trick against Italy last week.
But 30-year-old Maitland – who played in five Tour matches, scoring one try against the Melbourne Rebels, on the 2013 Tour to Australia – offers bags of experience.
And facing last year’s Grand Slam winners Ireland, Townsend admits having an extra veteran presence swayed his decision.
“We were always hoping Sean would get back fit for this game,” he said. “Sean would have been starting against Italy with Tommy Seymour if he’d been fit.
“Blair’s performance meant we had an extended discussion that went on a second day, but we believe that Tommy and Sean are best for this game.
“But nothing should be taken away from Blair’s performance and what he could do if he was selected this week.
“Players take (being dropped) differently — sometimes they’re quiet, sometimes they’re accepting and sometimes they argue back. Blair was quiet. He’ll be disappointed, I know.”
Maitland forms an all-British & Irish Lions back three with Stuart Hogg and Tommy Seymour, while the other changes see Josh Struass in for the injured Sam Skinner, fit-again Jonny Gray return in the second row and Simon Berghan replacing the injured WP Nel.
Townsend – himself a Lion, who played in two Tests on the memorable 1997 Tour to South Africa – has opted for experience across the board and concedes that is a deliberate ploy.
“It’s huge. Most of those players, if not all, played against Ireland last year and in 2017, so they know what Ireland are capable of and what a good team they are,” explained Townsend.
“But they also know what we did well in those two games, so to have that level of quality and conversation as you lead into a game is as important as the experience they have when they get on the field.”
Scotland team to play Ireland in the Six Nations
15. Stuart Hogg (Glasgow Warriors)
14. Tommy Seymour (Glasgow Warriors)
13. Huw Jones (Glasgow Warriors)
12. Sam Johnson (Glasgow Warriors)
11. Sean Maitland (Saracens)
10. Finn Russell (Racing 92)
9. Greig Laidlaw (Clermont Auvergne) (Capt)
1. Allan Dell (Edinburgh)
2. Stuart McInally (Edinburgh)
3. Simon Berghan (Edinburgh)
4. Grant Gilchrist (Edinburgh)
5. Jonny Gray (Glasgow Warriors)
6. Ryan Wilson (Glasgow Warriors)
7. Jamie Ritchie (Edinburgh)
8. Josh Strauss (Sale Sharks)
16. Fraser Brown (Glasgow Warriors)
17. Jamie Bhatti (Glasgow Warriors)
18. D’arcy Rae (Glasgow Warriors)
19. Ben Toolis (Edinburgh)
20. Rob Harley (Glasgow Warriors)
21. Ali Price (Glasgow Warriors)
22. Pete Horne (Glasgow Warriors)
23. Blair Kinghorn (Edinburgh)