I think there are two reasonable approaches to delegation.
One is what you are describing, where someone publicly states how they plan to vote on the proposals. For example, “I intend to vote for A, B, and C and against X, Y, and Z. If that aligns with you, feel free to delegate to me at the following address.” This gives people a clear basis for deciding whether they want to delegate.
The other is to delegate to someone you already trust, whether it is an individual, community group, or organization. In that case you are relying on their judgment to make decisions on your behalf, rather than on a predetermined list of votes.
For me, both as an individual and as a representative for Shielded Labs, I am not vocal about which proposals I support or oppose because I am helping organize and facilitate the polls. I want to remain neutral so the process does not tilt toward any particular outcome. Publishing how I intend to vote could be seen as trying to influence the community or using my role to shape the result, which is exactly what I want to avoid.
I do think it makes sense for others, especially people who are seeking delegation and who are not involved in running the process, to be transparent about how they plan to vote. Providing that context gives people the information they need to decide whether a delegate’s perspective matches their own.