It's easy for any Argentine politician to declare their intent to "take back Las Malvinas".
Actually doing so would be hard; The roughly 3,700 population are protected by a permanent garrison of over 1,000 British military personnel, an airbase with four Eurofighter Typhoon jets on 24/7/365 standby, and a significant rotating Royal Naval presence usually including at least one Type 45 Guided Missile Destroyer.
There's also a volunteer company of about 100 Falklanders (2.7% of the entire population) who are trained and equipped by the British forces on the islands.
These immediately available forces have the ability to hold off any likely Argentine force until reinforced; The new airbase at RAF Mount Pleasant, built after the 1982 war, includes a runway suitable for intercontinental wide-bodied jets, and a port facility (Port Mare) designed to accommodate Royal Naval vessels to allow rapid landing of further troops in the event of war.
Since 1982, the British have made the islands into a much tougher target for Argentina - and even back then, it took only a couple of months for the invaders to be defeated.
Argentina has close to zero chance of re-invading the islands, and even closer to zero chance of holding on to them if they somehow managed to do so. The British Military may be a shadow of its former strength, but it's easily a match for anything Argentina could plausibly send to the Falklands.