Because he was trying to surprise who he was. Varadkar and Buttimer coming out as gay played a huge role in marriage equality that LGBT+ people now have.
Indeed, and let's not forget the disgusting homophobic tirades towards Varadkar from not just the Sinn Fein cultists but from Shinner politicians too.
Eg
Leo Varadkar publicly criticized Sinn Féin in 2020 following a controversial tweet by Sinn Féin TD Brian Stanley, which referenced Varadkar's sexuality. Varadkar accused Sinn Féin leadership of tolerating homophobia, racism, and sexism, claiming the party saw gay and mixed-race people as "fair game" for criticism. [
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For background on Leo Varadkar's experiences regarding public and political life as an openly gay leader.
Sinn Féin sees gay and mixed race opponents as 'fair game' - Varadkar
9 Dec 2020 — Tánaiste accuses McDonald of trying to play down controversy over Brian Stanley tweets. Expand. Tánaiste Leo Varadkar has alleged that Sinn Féin sees gay and mi...
The Irish Times
Ireland's Varadkar accuses Sinn Féin of defending homophobia, racism, sexism
9 Dec 2020 — Irish deputy PM says Sinn Féin leader seeking to justify 'latent homophobia' in her party. Leo Varadkar speaking to the media in Dublin | Aidan Crawley/EFE via ...
www.politico.eu
No apology to make for Leo Varadkar ‘sexuality tweet’, says Brian ...
4 Dec 2020 — Brian Stanley, the Sinn Féin TD, has said he has “no apology to make” over a tweet in 2017 that referenced Leo Varadkar's sexuality. Mr Stanley, chairman of the...
The Times
Varadkar says Sinn Féin response to Stanley tweet controversy ‘ ...
8 Dec 2020 — Varadkar says Sinn Féin response to Stanley tweet controversy 'woefully inadequate' ... Tánaiste Leo Varadkar has claimed Sinn Féin's response to controversy fo...