It was a question that was being asked again after the talented batsman's latest one-day global hundred saw England to a 12-run win over Pakistan in the second one-day worldwide on Saturday.
Buttler's 110 came off 55 balls and included six fours and nine sixes.
He has claimed five of the 10 fastest centuries scored by English batsmen in ODI history, the latest of which was added in the previous game.
Buttler blasted a 50-ball century in second ODI against Pakistan, prompted Nasser Hussain to rank buttler among the all-time greats.
This was the 35th time since their miserable first-round exit at the 2015 World Cup that England had posted a total in excess of 300 - a feat they had achieved only 34 times in total prior to that tournament - an encouraging sign just weeks away from this year's edition.
A good grounding in other sports while he was at school such as hockey, tennis and squash - something which also benefitted De Villiers - has enabled Buttler to wield a cricket bat with precision and power.
Bairstow, on four, gloved a pull off Junaid Khan and Shaheen Afridi failed to react quickly enough at short backward square.
Earlier, Jason Roy (87) and Jonny Bairstow (51) laid a platform for the innings with an opening stand of 115 after Morgan won the toss.
After recovering from a back spasm while batting for Surrey in the Royal London One-Day Cup last month, Roy believes his injuries woes are now behind him.
Fakhar, the century-making hero of Pakistan's 2017 Champions Trophy final win over India at The Oval, was soon driving the recalled Woakes for six and later twice struck the fast-medium bowler for cheeky scooped fours.
TV umpire: Paul Reiffel (AUS) Match referee: Richie Richardson (WIS).
The only downside for England was that captain Eoin Morgan has risked a potential one-match ban for his side's slow over rates.
Pakistan's defeat showed how once impregnable ODI totals can now be overhauled in modern limited-overs cricket.
The 23-year-old might cut an unusual figure at the crease as he bats in spectacles, but he only had eyes for a ball that he regularly sent to the boundary.
He had missed the second ODI against England in Southampton owing to what was termed by the team officials as viral infection and now, he is most likely to miss the third encounter as well in the five-match series. He will be hungry to plunder more runs.
Haris was punished for some bad running between the wickets, the nifty footwork of Tom Curran leaving him stranded when a little bit of urgency or a final dive would have saved him.
Asif Ali, however, ensured Pakistan stayed in the game with 51 before he was caught in the deep off David Willey, who held his nerve well to take two wickets for 57 runs in 10 overs.
A Ali got some quick runs.
But England coasted home and now head to Trent Bridge on Friday 2-0 ahead with two games to play.