Not always. A lot of the time people will just lie about what they actually believe and why they believe it.

For example. People are going to say they support free speech because they believe in it as an important principle for a free society. No one is going to say they support free speech because actually they're a full on Nazi and this is the only way to get their message out to the public until they get the reigns and then they can dispense will al the "free speech" stuff and lock down the opposition.

Actually this applies to a lot of politics related stuff. For example politicians always talk about how tax breaks are going to stimulate the economy, none of them say "well my mate paid me a few million under the table to push this, even though 'trickle down' has never worked in the 100+ years that it's been around".

Security patches, Everyone says "We need to insure that all new software has up to date security and patches.", no one says "We want to collect every single bit of telemetry and integrate end to end DRM and the only way that can work is if the device is completely locked down so the users can't bypass or root it.".