TLDR: That discourse with your friends
IS democracy. We need more of it.
Ya. Platforms are just one facet of the full package.
I've participated in politics in the USA. One fascinating part is the endorsement process. My local party is one of remaining orgs that does rigorous endorsements. Fewer orgs do it over time, tracking with the decline of local (political) news and rise in campaign spending (drowning out all other signals).
Some other tenacious orgs still doing endorsement processes are League of Women Voters, Urban League, Municipal League, League of Conservation Voters, NARAL, most unions, Chambers of Commerce, etc. Every org does their own thing; so this inside baseball game is a whole 'nother world of politics.
It's a lot of work, for all involved.
Candidates seeking our endorsement fill out surveys. This is above and beyond their public platform (position) statements. Some of our questions are deal breakers, where candidates have to abide by our bylaws and positions, by design.
Candidates are rarely blank slates. We also research their past voting, activities, where they get their funding, and so forth.
Then we do endorsement interviews. Every one gets the same prepared, canned questions (for fairness).
Every single election cycle, at least one of our interviews makes the local news. So it's clearly impactful.
During our deliberations, we also consider candidate's campaigns and reputations. We have a heavy bias towards people who play ball, gets things done, are effective. In other words, we're not much interested in someone who agrees with us 100%, but is unlikely to attain our policy goals.