Most probably because how buttons are arranged and named in the UI of their client. And noone that uses such a method bothers because it works.

nostr:nevent1qqsgyqxdntfv7ewmtar0t8v2s0wwcr9zmg5sy9qr4vy79a5qlc5zcnsppemhxue69uhkummn9ekx7mp0qgs03ekxgdp0rczjfqrrpcn7zqtdec6lcwnpfesyxnl0f239qvege2grqsqqqqqp8md4dx