Both of those would be considered extremely rare events. If you pull a gun on federal agents, you are likely to be shot. The Bundy case is an aberration.
That’s not true. Federal agents have numerous armed standoffs that don’t result in anyone getting shot. In the recent Oregon standoff, involving 26 armed militiamen, just one person was killed. When someone does get killed, there is often huge public backlash.
Consider Ruby Ridge, where a US militant family had an armed standoff with the US Marshall’s after the father missed a court date for an unrelated charge: https://en.m.wikipedia.org/wiki/Ruby_Ridge. In an initial firefight, one member of the family and one federal agent were killed. Later, a federal sniper shot and killed the mother, and shot the father. After the incident ended, the father was acquitted of all charges except missing the original court date. One of the sons, who had killed the federal agent, was acquitted of all charges. The government settled wrongful death actions for over $3 million. Several years later, the state prosecutor indicted the federal agent who had killed the mother (though the charges were dismissed after a different prosecutor was elected).
How many people need to senselessly die before we realize that sometimes it's better to just let some lunatic hole up in his house for a few weeks while an FBI agent drinks coffee, reads the news, and waits for them to surrender. That agent was killed while sneaking up to the house like he was a member of Seal Team 6 and stumbled upon the kid out hunting, instead of just driving up to the house and saying "hey, you missed your court date - you're eventually going to need to see the doctor, dentist, or buy ice cream, so let's settle this like adults."
Ever since the government has taken a more "wait them out" approach which has worked better for everyone except arguably the government who's lost in court several times since.
In most cases where the "wait them out" strategy is abandoned, it's because their are children involved and there is legitimate reason to be concerned for their safety.