Sure, some people have a natural knack with words and a killer imagination. But writing is still something everyone can learn. In fact, the best writers out there are the ones who never stop learning.
2. A perfectly wonderful book will get you published.
Sadly, not always the case. Plenty of amazing books never make their way to print. The publishing industry is no different than any other industry. There are trends readers flock to and it's a publisher's job to know and understand how they work. Does that mean you shouldn't try to polish your book if it's not what a publisher is looking for? Heck no. Someone has to be the trendsetter, and if your book captures their eyes, it might just be you.
3.Once you've published a book, your career is set.
One book deal won't always lead to another. Good sales and another solid book will help your chances, but writing isn't a show up and cash the check kind of job.
4. Writing gets easier.
You might find outlining or structuring easier. Maybe you lock in on a specific revising technique that works great for you. But the actual writing? The meat and bones of diving into a character's mind and bringing it to life on page? Not so much. Each story comes with its own struggles, be it world-building or character development, and it's completely normal to reach the point of wanting to chuck it in the trash. The key is to not give up.